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"And yes, there will always be extremists like whoever attacked the bar, but overall, I think this country has made incredible progress. The president is about to celebrate the second anniversary of the Alien Amnesty Act, and for the first time on Earth, aliens are embraced as citizens with equal rights."
Kara Danvers to J’onn J’onzz
"The American Alien" is the first episode of the fourth season of Supergirl, and the sixty-sixth episode overall. It aired on October 14, 2018.

Synopsis

Diving back into reporting, Kara welcomes a new cub reporter to CatCo. Meanwhile, James and Lena argue about James' impending indictment for acting as the vigilante Guardian, while Alex and Brainy struggle to get in sync at the D.E.O.. Supergirl is called into action when remnants of the anti-alien terrorist organization Cadmus try to assassinate pro-alien leaders, but their endgame turns out to be much more sinister than she expected. J'onn relishes his peaceful new life, but an outing with an old friend causes him concern.[1]

Trivia

Goofs 

  • President Marsdin mentioned that former president Dwight D. Eisenhower named Camp David after his son and grandson, who were both named David. In real life though, the camp was actually named after Eisenhower's father and grandson; his sons were named Doud and John.
    • However, it's possible the naming of the camp might be different in Earth-38's history.

References

  1. Supergirl Season Premiere Spoilers & Photos: “American Alien” - KryptonSite